Where did the ability “Paper cut” come from?

One of the players in my group uses PCGen to make her sheets, and she seems to have accidentally added a weird property to her bow for free. It claims to be from the Bestiary 3 and be called “Paper Cut”, but there’s no cost associated with it. It seems like it deals bleed damage on hit. What is this meant to be, some kind of monster ability? Is this a weird PC Gen only thing? Or a transcription error?

Here’s the weapon in question:

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